Oxybenzylidene-bornanones, their preparation and their use in cosmetics

Compound having the general formula:

• ##STR18## in which:
• Z and Z' independently denote a hydrogen atom or a SO.sub.3 H radical or a salt thereof with an inorganic or organic base, at least one of Z and Z' denoting a hydrogen atom;
• R.sub.1 denotes a hydrogen atom, an alkyl radical containing 2 to 18 carbon atoms when R.sub.2 is other than an alkoxy radical, an alkyl radical containing 1 to 18 carbon atoms when R.sub.2 is an alkoxy radical, an alkenyl radical containing 3 to 18 carbon atoms, a radical of formula ##STR19## or a salt thereof with an organic or inorganic base, or --(CH.sub.2).sub.m CO.sub.2 R, in which R denotes H or an alkyl radical containing 1 to 8 carbon atoms, or a divalent radical of formula --(CH.sub.2).sub.m -- or --CH.sub.2 --CHOH--CH.sub.2, m having a value from 1 to 10, n having a value from 1 to 20 and p having a value from 1 to 6, and R.sub.3 and R.sub.4 each independently denote a hydrogen atom or an optionally branched or hydroxy alkyl radical, or R.sub.3 and R.sub.4 together form a morpholino or a piperidino ring with the nitrogen atom to which they are attached;
• R.sub.2 denotes a hydrogen atom, an alkoxy radical containing 1 to 4 carbon atoms or a divalent radical --O-- bonded to the radical R.sub.1 if the latter is also divalent;
• q denotes 1 or 2, such that if q is 2, R.sub.1 is a said divalent radical, with the proviso that if R.sub.1 denotes hydrogen R.sub.2 also denotes hydrogen;
• when q is 1, at least one of Z, Z', R.sub.1 and R.sub.2 is not hydrogen and when Z and Z' are both hydrogen, R.sub.1 is not --CH.sub.2 -- when R.sub.2 is --O--.